CONFIG_DMAR_DEFAULT_ON: Enable DMA Remapping Devices by default

General informations

The Linux kernel configuration item CONFIG_DMAR_DEFAULT_ON has multiple definitions:

Enable DMA Remapping Devices by default found in drivers/iommu/Kconfig

The configuration item CONFIG_DMAR_DEFAULT_ON:

• prompt: Enable DMA Remapping Devices by default
• type: bool
• depends on: CONFIG_DMAR
• defined in drivers/iommu/Kconfig
• found in Linux kernels: 3.1

Help text

Selecting this option will enable a DMAR device at boot time if one is found. If this option is not selected, DMAR support can be enabled by passing intel_iommu=on to the kernel.

Enable DMA Remapping Devices by default found in arch/x86/Kconfig

The configuration item CONFIG_DMAR_DEFAULT_ON:

• prompt: Enable DMA Remapping Devices by default
• type: bool
• depends on: CONFIG_DMAR
• defined in arch/x86/Kconfig
• found in Linux kernels: 2.6.29–2.6.39, 3.0

Help text

Selecting this option will enable a DMAR device at boot time if one is found. If this option is not selected, DMAR support can be enabled by passing intel_iommu=on to the kernel. It is recommended you say N here while the DMAR code remains experimental.

Enable DMA Remapping Devices by default found in arch/ia64/Kconfig

The configuration item CONFIG_DMAR_DEFAULT_ON:

• prompt: Enable DMA Remapping Devices by default
• type: bool
• depends on: CONFIG_DMAR
• defined in arch/ia64/Kconfig
• found in Linux kernels: 2.6.29–2.6.39, 3.0

Help text

Selecting this option will enable a DMAR device at boot time if one is found. If this option is not selected, DMAR support can be enabled by passing intel_iommu=on to the kernel. It is recommended you say N here while the DMAR code remains experimental.

Hardware

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